Features: 1.The alarm button Release Emergency Break Glass helps to save lives in emergency situations. 2.Support Electric Control or Access Control System. 3.Made of flame?retardant PC material, very convenient and safe. 4.Witnesses only need to break the panel glass of the fire safety alarm button to send the fire alarm signal to the controller and send part of the fire alarm signal. 5.It is a better protector at home, shop and other places, and if they take preventive measures and prepare in advance, it is much better for the public and for us. Specification: Features:_x000D_ _x000D_ The alarm button Release Emergency Break Glass helps to save lives in emergency situations. _x000D_ Support Electric Control or Access Control System. _x000D_ Made of flame-retardant PC material, very convenient and safe. _x000D_ Witnesses only need to break the panel glass of the fire safety alarm button to send the fire alarm signal to the controller and send part of the fire alarm signal. _x000D_ It is a better protector at home, shop and other places, and if they take preventive measures and prepare in advance, it is much better for the public and for us. _x000D_ _x000D_ Specifications:_x000D_ Control mode: glass breakage trigger_x000D_ Connection Port: Common End, Normally Closed End, Normally Started_x000D_ Transmission current: